If Zig is built on a C compiler, and (I assume) the C compiler self-hosts, then if Zig starts to self-host, it doesn't _introduce_ the dependency on a chain of previously built binaries, it just makes it a step more severe while removing a dependency.

Would you prefer if Zig not only didn't self-host, but didn't have any self-hosting dependencies? For your ideal compiler, would a full build from scratch require making a platform-specific assembler from machine code, then a few stages of successively higher-level languages?